
41 A 330.ohm resistor is connected to a 5.00volt battery. The current through
the resistor is
(1) 0.152 mA
(2) 15.2 mA
(3) 335 mA
(4) 1650 mA


Note that question 42 has only three choices.
42 Compared to the period of a wave of red light the period of a wave of green light
is
(1) less
(2) greater
(3) the same


43 A hydrogen atom with an electron initially in the n = 2 level is excited further
until the electron is in the n = 4 level. This energy level change occurs because
the atom has
(1) absorbed a 0.85eV photon
(2) emitted a 0.85eV photon
(3) absorbed a 2.55eV photon
(4) emitted a 2.55eV photon


44 Which graph best represents the relationship between resistance and length of
a copper wire of uniform crosssectional area at constant temperature?


45 The diagram below represents a block at rest on an incline.
Which diagram best represents the forces acting on the block?
(F_{f} = frictional force, F_{N} = normal force, and F_{w}
= weight.)


46 A 1.0 × 10^{3}kilogram car travels at a constant speed of 20. meters
per second around a horizontal circular track. Which diagram correctly represents
the direction of the car’s velocity (v) and the direction of the centripetal
force (F_{c}) acting on the car at one particular moment?


47 Which graph best represents the relationship between the magnitude of the electrostatic
force and the distance between two oppositely charged particles?
